132 PROCEEDINGS OF THE NATIONAL MUSEUM. tol. 51. 



flattened hairs. Body densely scaly. Propodeum noncarinate, with 

 spiraciilar sulci. Scutellum with six bristles, three to a side, two 

 of these cephalad of middle. Middle femur at mesal apex with a 

 stout bristle. 



The male is the same (antennae not seen) but the abdomen is de- 

 pressed and the proximal spot on the fore wing is absent. 



Described from four males, two females in the United States 

 National Museum, labeled " Santa Cruz Mountains, California, 59." 



Types.— Cat. No. 19618, U.S.N.M., two pairs on four tags plus 

 a slide bearing the female head, a pair of wings and a caudal tibia. 



TETRASTICHOPSIS, new genus. 



Female. — Like Aprostocetus Westwood but the scutellum with 

 only the lateral of the four grooved lines. 



Type of the genus. — Tetrastlchopsis prlonomeri., new species. 



TETRASTICHOPSIS PRIONOMERI, new species. 



Female. — Length, 1.10 mm. 



Dark metallic blue, the knees, tibiae, and tarsi (except the last 

 joint of the latter) golden yellow, the wings hyaline, the venation 

 dusky pallid. Differs from Tetrastichus microrhopalae Ashmead 

 especially in being darker and the funicle joints are shorter, all 

 slightly wider than long rather than somewhat longer than wide 

 as in the other species. It differs from Tetrastichus rapo Walker 

 (Crawford and Gahan) in having funicle 1 subquadrate instead of 

 somewhat longer than wide and the median carina of the propodeum 

 is more distinct. From Geniocerus chrysopae Crawford only in the 

 generic character. From Tetrastichus hruchophagi Gahan in hav- 

 ing the funicle joints distinctly shorter and the body less metallic. 

 Propodeum with a median carina in all of these species but no lat- 

 eral one ; also the club has a terminal nipple. Pedicel in prionomeri 

 a little longer than funicle 1. 



Described from four females reared from Prionomerus calceatus, 

 a leaf -miner in sassafras, Clarksville, Tennessee, Jvme 18, 1915 (W. D. 

 Pierce). 



Types.— Cat. No. 19649, U.S.N.M., four females on tags, a head 

 on a slide. 



TETRASTICHOMORPHA AJAX. new species. 



Female. — Length, 1.50 mm., excluding the ovipositor which is ex- 

 serted for three-fourths of the abdomen's length. 



Agreeing with the original description of Aprostocetus canadensis 

 Ashmead but dark green, the legs golden yellow except the coxae 

 and femora, the latter golden yellow along distal third. Mandibles 

 tridentate. Club with a small terminal nipple. Scape compressed; 

 pedicel subequal to funicle 2 which is a little shorter than 1, the 



